package servlet;

import pojo.Dept;
import service.DeptService;
import service.impl.DeptServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet(urlPatterns = "/dept")
public class DeptServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        DeptService deptService = new DeptServiceImpl();
        String action = req.getParameter("action");

        if("list".equals(action)){
            String name = req.getParameter("name");
            Dept condition = new Dept(name);
            List<Dept> depts = deptService.findAll(condition);
            // 把数据放到请求域中
            req.setAttribute("depts", depts);
            req.setAttribute("condition", condition);
            // 在哪个页面显示数据
            req.getRequestDispatcher("/list.jsp").forward(req, resp);
        }
        else if("add".equals(action)){
            req.setCharacterEncoding("UTF-8");
            String name = req.getParameter("name");

            int result = deptService.addDept(new Dept(name));
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
        }
        else if("delete".equals(action)){
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);

            int result= deptService.deleteDeptById(id);
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
        }
        else if("toupdate".equals(action)){
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);

            Dept dept = deptService.findDeptById(id);

            //把数据存储在作用域中
            req.setAttribute("dept",dept);
            //把数据呈现出来
            req.getRequestDispatcher("/update.jsp").forward(req,resp);
        }
        else if("update".equals(action)){
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            String name = req.getParameter("name");

            int result= deptService.updateDept(new Dept(id,name));
            if(result>0) {
                //重定向
                resp.sendRedirect("dept?action=list");
            }
        }

    }
}
